论文部分内容阅读
采用化学共沉淀法制备了钕离子(Nd3+)掺杂铁氧体纳米晶材料。利用Gouy磁天平、X射线衍射、红外光谱、透射电镜(transmission electron microscope,TEM)和X射线能谱分析等对产物进行了表征,研究了Nd3+掺杂量对Fe3O4纳米晶的结构和磁性的影响。结果表明:在Fe3O4晶格中掺杂适量Nd3+能提高材料的磁性,当摩尔比n(Fe3+):n(Nd3+)=29:1时,其磁性最强,此时Nd3+以直接充填的方式占据Fe3O4晶格中的B位。随着Nd3+掺杂量的增加,Nd3+取代B位的Fe3+的进入晶格,使磁矩降低。TEM分析表明:制得的Nd3+掺杂铁氧体纳米晶颗粒大小较均匀,平均粒径约为8 nm。
The neodymium ion (Nd3 +) doped ferrite nanocrystalline material was prepared by chemical coprecipitation method. The products were characterized by Gouy magnetic balance, X-ray diffraction, infrared spectroscopy, transmission electron microscopy (TEM) and X-ray energy spectrum analysis. The effect of Nd3 + doping on the structure and magnetic properties of Fe3O4 nanocrystals . The results show that Nd3 + can increase the magnetic properties of the Fe3O4 crystal lattice. When the molar ratio of n (Fe3 +): n (Nd3 +) = 29: 1, the magnetism is the strongest. Nd3 + B in Fe3O4 lattice. With the increase of Nd3 + doping amount, Nd3 + substitutes the Fe3 + of B site into the crystal lattice to reduce the magnetic moment. TEM analysis shows that the size of Nd3 + -doped ferrite nanocrystals is uniform and the average particle size is about 8 nm.